ITunes will not open up after the latest iTune update 12.01 on my iMac (late 2009)

The latest iTunes 12.01 refuses to open on my iMac (late 2009) after installing Yosemite, but works OK on my Mac Mini (late 2012) also with Yosemite. help!

Hi there 1302Scotty1944,
You may want to try reinstalling iTunes as an initial troublshooting step. The article below has more information.
Troubleshooting iTunes installation on Mac OS X
-Griff W.

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